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<h1 class="entry-title">jQuery.cssNumber</h1>
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						所属分类：<span class="category"><a href="/category/css/">CSS</a></span><span class="category-divider"> | </span><span class="category"><a href="/category/manipulation/">DOM 操作</a> &gt; <a href="/category/manipulation/style-properties/">CSS 属性</a></span>
<span class="pull-right">英文文档：<a href="https://api.jquery123.com/jQuery.cssNumber/" target="_blank">jQuery.cssNumber</a></span>
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<span>jQuery.cssNumber</span><span class="returns">Returns: <a href="http://api.jquery.com/Types/#Object">Object</a></span>
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<p class="desc"><strong>Description: </strong>An object containing all CSS properties that may be used without a unit. The <a href="/css/"><code>.css()</code></a> method uses this object to see if it may append <code>px</code> to unitless values.</p>
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<span class="version-details">version added: <a href="/category/version/1.4.3/">1.4.3</a></span>jQuery.cssNumber</h4></li></ul>
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<p>You can think about <code>jQuery.cssNumber</code> as a list of all CSS properties you might use without a unit. It's used by <a href="/css/"><code>.css()</code></a> to determine if it needs to add <code>px</code> to unitless values.</p>
<p>The keys of the <code>jQuery.cssNumber</code> object are camel-cased and the values are all set to <code>true</code>. If you want to prevent the <a href="/css/"><code>.css()</code></a> method from automatically adding the <code>px</code> unit for a specific CSS property, you can add an extra property to the <code>jQuery.cssNumber</code> object.</p>
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<pre><div class="container"><div class="line"><code>jQuery.cssNumber.someCSSProp = <span class="literal">true</span>;</code></div></div></pre>
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<p>By default the object contains the following properties:</p>
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<li><code>zIndex</code></li>
<li><code>fontWeight</code></li>
<li><code>opacity</code></li>
<li><code>zoom</code></li>
<li><code>lineHeight</code></li>
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<code>widows</code> (added in jQuery 1.6)</li>
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<code>orphans</code> (added in jQuery 1.6)</li>
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<code>fillOpacity</code> (added in jQuery 1.6.2)</li>
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<code>columnCount</code> (added in jQuery 1.9)</li>
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<code>order</code> (added in jQuery 1.10.2)</li>
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<code>flexGrow</code> (added in jQuery 1.11.1)</li>
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<code>flexShrink</code> (added in jQuery 1.11.1)</li>
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